linux-kernel - Re: [PATCH 15/70] x86/boot/compressed/64: Always switch to own page-table

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Message-ID: <20200406115659.GD2520@zn.tnic>
Date:   Mon, 6 Apr 2020 13:56:59 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Joerg Roedel <joro@...tes.org>
Cc:     x86@...nel.org, hpa@...or.com, Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Jiri Slaby <jslaby@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Juergen Gross <jgross@...e.com>,
        Kees Cook <keescook@...omium.org>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH 15/70] x86/boot/compressed/64: Always switch to own
 page-table

On Thu, Mar 19, 2020 at 10:13:12AM +0100, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@...e.de>
> 
> When booted through startup_64 the kernel keeps running on the EFI
> page-table until the KASLR code sets up its own page-table. Without
> KASLR the pre-decompression boot code never switches off the EFI
> page-table. Change that by unconditionally switching to our own
> page-table once the kernel is relocated.
> 
> This makes sure we can make changes to the mapping when necessary, for

Pls use passive voice in your commit message: no "we" or "I", etc, and
describe your changes in imperative mood.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette